CRYSTALLOGRAPHIC, MAGNETIC, AND ELECTRICAL-PROPERTIES OF SRTI1-XRUXO3 PEROVSKITE SOLID-SOLUTIONS

The perovskite compounds SrTiO3 (semiconductor, cubic, and diamagnetic) and SrRuO3 (metallic conductor, orthorhombic, and ferromagnetic) form a continuous series of solid solutions of the formula SrTi1-xRuxO3. Increasing substitution of titanium by ruthenium led to a change in the crystallographic, magnetic, and electrical properties. As x increased the latter properties changed from semiconductor to metallic at x values between 0.40 and 0.50. A change from cubic to orthorhombic structure was also observed in the same compositional range as the Ru content increased. The compounds with x = 1.00, 0.80, 0.50, and 0.33 obeyed the Curie-Weiss law, with the Weiss constant (θ) and Curie constant (Cm) decreasing as x decreased. © 1993 Academic Press, Inc.